A groundbreaking technical analysis of yacht design based on cutting edge research in the field of aero-hydrodynamics.

A reference book for anyone wishing to understand the factors governing the performance of a sailing boat. Examined here are the fundamental factors governing a hull's behaviour, the principles underlying aero- and hydrodynamics, the performance and efficiency of aerofoils and hydrofoils, and an in-depth study of the behaviour of sails. The appendices take an in-depth look at high speed sailing and examine developments in hull appendages.A new appendix in this edition presents a simple graphic method of predicting a yacht's behaviour in a variety of wind and wave conditions which will add to our knowledge of how important such factors as sail camber, stability and the reduction of hull resistance are to a yacht's speed performance. Professor Marchaj is also the author of Sail Performance and Seaworthiness, the Forgotten Factor.

A groundbreaking introduction to how sailboats behave, and a guide for predicting the performance of a modern sailing yacht Aero-hydrodynamics and the Performance of Sailing Yachts is the first major yacht design treatise to come along in a decade. With its cutting-edge explanations of how sails, keels, and rudders interact with their respective fluids to make a boat sail--and of how to use that knowledge to optimize a boat--this is a book that every student of yacht design will want on his or her shelf.

The international classic work of reference for anyone wishing to understand the factors governing the performance of a sailing boat. Everyone interested in yacht design should read this book. A new Appendix in this Third Edition presents a simple graphic method for predicting a yacht's behavior.

How and why does sail boat performance depend on the configuration and trim of boat and sails? This book provides the yachtsman with answers in a relatively straightforward account of the physical mechanisms of sailing. It presents an accessible overview of the fluid dynamic aspects of sailing and sailing technology, addressing both aeromechanics and hydromechanics. Readers are provided with the basic principles of physics and general mechanics that will assist their understanding of the fluid mechanics of sailing yachts. Rich appendices cover not only in-depth,mathematical-physical treatments and derivations for those wishing to explore further, but also helpful summaries of basic mathematical notions for those wishing to refresh their knowledge. This work explores keel yachts, specifically single-masted mono-hulls with ‘fore-and-aft’, Bermuda-rigged sails. However, much of it is applicable to other types of sailing vessels such as multi-hulls, yachts with multiple masts, windsurf boards and the like. Yachtsmen, yacht designers and professionals of sailing technology will all find something of interest in this work which provides explanations of the mechanics of sailing in a way that is scientifically justified, whilst remaining appealing to those wishing to use their knowledge on-board a sailing vessel. For some years I’m teaching a course on “Sailing Yacht Design” in the master class of yacht design. Actually, I’ve found your book the best one about physics of a sailing yacht I’ve ever read. Edward Canepa, assistant professor in Fluid Machinery at the University of Genova (Italy) ...very impressed, no wonder it took so long. It is “everything I ever wanted to know about sailing but was afraid to ask” ! Frank Woodward, former computational fluid dynamicist at the Boeing Company and Analytical Methods Inc., and a cruising yachtsman